Dating a Fender Neck

I have a jazz neck with no body. I bought it used in the late 80's and it was attached to a P shaped body that I don't think was a Fender. I have now idea how old it is. The number 023 is stamed to the butt next to the truss rod opening. It has a rosewood f/b, pearl block inlays and white binding around the f/b. The logo has some pattent #'s and the words "offset contour body patented" more towards the front. I realize it may by hard with no serial # but I thought I'd give it a try.

Largely from the tuners. It looks like they say Fender, and I believe they changed the tuners sometime around that era, these are what are on my '78. From there, the decal doesn't have a serial number (they put them on the headstock starting in 1976) so I figure it's before that, but not too much.